Riverside
- County:
- Hand County
- County Seat:
- No
- Area (mi²):
- 35.925
- State:
- South Dakota
Riverside is located in Hand County, South Dakota. Riverside has a 2025 population of 21 . Riverside is currently declining at a rate of -4.55% annually and its population has decreased by -4.55% since the most recent census, which recorded a population of 22 in 2020.